Fujitsu AIRSTAGE V-II, Service Manual

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Compressor Temp Sensor 2 Error
DC
CN145
TH
ER
M
IS
TO
R
(C
O
M
P
SH
EL
L2
)
B
LA
C
K
B
LA
C
K
1 2 3
1 2 3
Compressor temperature thermistor 2
Compressor temperature thermistor 2 short detected
Compressor thermistor 2 open detected after compressor 2 operated
continuously for 5 minutes or more
1. Connector connection defective, open
2. Thermistor defective
3. Main PCB defective
OK
OK
Check Point 1 : Check the connector connection and cable open
Connector connection state check
Cable open check
Check Point 2 : Check the thermistor
Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)
* For the thermistor characteristics, refer to the Service Parts Information 22.
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN145:1-3) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Compressor temperature sensor 2 (CN145:1-3)
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. 72. 2
Error Code : 72
If the voltage does not appear, replace Main PCB and set up orignal address.
(Refer to 06-03 page Main PCB removal.)
04-37
Trouble shooting 29 Indicate or Display:
Detective Actuators: Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :